Envelope



H. F. NILES July 21, 1931 ENVELOPE Filed May 22. 1929 Patented July 21, 1931 PATENT OFFICE HARRY F. NILES, OF CHICAGO, ILLINOIS ENVELOPE Application filed May 22,

My invention is concerned with improvements in envelopes, and is designed to pro duce an envelope in which a stamp placed thereon will more certainly adhere thereto than with the ordinary construction.

It is further concerned with an envelope in which the closing flap will more certainly adhere than the ordinary construction when the envelope is closed and sealed.

Finally, it is concerned with an envelope having one or both of these features, which can be readily packed tightly in boxes without danger of their adhering to each other.

To illustrate my invention, 1 annex here- 15, to a sheet of drawings in which the same ref-- erence characters are used to designate identical parts in all the figures, of which,-

Fig. l is a front elevation of an envelope containing my invention, closed and sealed;

Fig. 2 is a rear elevation of the same, with the flap raised;

Fig. 3 is a vertical section on the line 3-3 of Fig. 2; and,

Fig. 4 is a vertical sectionon the line l4 of Fig. l.

The envelope a, per se, is of the customary construction, and the first feature of my invention consists in forming a depression 6 in the place where the stamp is ordinarily applied, and preferably of the size and shape of a stamp. The bottom only of the depression is coated with an adhesive 0, preferably after the depression is formed, which may be the same as the customary adhesive (Z applied to the flap, as seen in Fig. 2. The purpose of the depression is to prevent the probability of the adjacent envelope adhering to the adhesive when the envelopes are packed tightly in a box prior to delivery to the user, the depression bringing the adhesive below the surface of the face of the envelope.

The second feature of my invention consists in similarly depressing a portion of the edge of the back of an envelope where it is overlapped by the closing flap and engaged by the adhesive (Z thereon. The bottom only of this depression is likewise covered (preferably after the depression is formed) with an adhesive 6 which co-operates with the adhesive (Z, and it will be obvious that, if either 1929, Serial No. 365,036.

the adhesive d or e is at all adequately moistened, the co-operating surfaces of the adhesive will cause a secure sealing that is not so readily obtained with the use of a single layer of adhesive. Similarly, when the gummed back of the stamp is moistened and applied to the adhesive 0, there will be no question of its adherence thereto. The adhesive d as customarily applied to envelopes makes a depression where it is applied, and as the adhesive 6 is on the bottom of a depressed surface, when the closing flap is folded over for packing in boxes, the two adhesive surfaces do not meet, and consequently do not have any substantial tendency to adhere when they are packed in boxes prepara tory to delivery.

lVhat I claim as new, and desire to secure by Letters Patent of the United States, is:

1. As a new and useful article of manufacture an envelope having an imperforate depression therein formed without reducing its thickness adapted to receive a stamp, the bottom of said depression being coated with an adhesive.

2. As anew and useful article of manufacture an envelope having an imperforate depression therein formed without reducing its thickness of a design corresponding to the stamp it is adapted to receive, the bottom of said depression being coated with an adhesive.

3. As a new and useful article of manufacture, an envelope having an imperforate portion thereof adapted to be overlapped by the sealing flap depressed and coated with an adhesive to co-operate with the adhesive on the sealing flap, the depression being formed without reducing its thickness.

4. As a new and useful article of manufacture, an envelope having that portion thereof adapted to be overlapped by the sealing flap depressed without reducing its thickness.

In witness whereof, I have hereunto set my hand this 6th day of May, 1929.

HARRY F. NILES. 

